Box lining machine



Dec. 29, 193a.

J. SCHNUR BOX LINING MACHINE Filedan. 10, 1934 Dec. 29, 1936. J 5CHNURBOX LINING MACHINE Filed Jan. 10, 1934 9 Sheets-Sheet 2 Jacob5chrww Dec.29, 1936. J. SCHNUR BOX LINING MACHINE Filed Jan. 10, 1934 9Sheets-Sheet 3 Dec. 29, 1936. J. SCHNUR 2,065828 BOX LINING MACHINEFiled Jan 10, 1934 9 Sheets-Shb 4 Dec. 29, 1936. J. SCHNUR 2,0s5s28 BOXLINING MACHINE Filed Jan. 10, 1934 9 Sheets-Shet 5 9 Shee'cs-Sheet 6 J.SCHNUR BOX LINiNG MACHI-NE Filed Jan. 10, 1934 Dec. 29, 1936.

Dec. 29, 1936.

.1. SCHNU R sox LINING MACHINE Filed Jan. 10, 1934 9 Sheets-Sheet 7Vooo0Oo000ocooo Q0 lll Dec. 29, 1936. J. scrmun BOX LINI)IG MACHINE 9Sheets-Sheet 9 Filed Jan. 10, 1954 Paitented Dec. 29, 1936 UN1TED STATESPATENT OFFICE nox LINING mcnnm Applica.tion J.nuary 10, 1934, Seria.lN0. 706,749

16 Claim5.

'I'hls 'invention relates to-box lining machi1ies, ang:l the mainobjects of the invention are to provlde means for automaticallyinserting lining materlal in a box; to provide such means which willpress the lining material to the bot tom and side walls cf the box andleave the lined box in condltion to receive a. fillin'g of the productfor which the lined box is intended, for example-a filllng of cheese,which may be poured directly into the lined box in Which lt subsequentlysetsor becomes firm; 1:0 provide means for automatically feeding theboxes 130 be lined and the lining material to the mechanism' forinserting the lining material in the boxes; and in general, lt is theobject of the invention to provide an improve d box lining machine.

Other objects and advantage 01 the invention will be understood byreference to the followin specification and accompanylng drawings (9sheets) in which there is illustrated a box lining machine embodying aselected form of the in- 1 vention.

In the drawings Fig. 1 is a plan of a portion of the machine; Fig. 2 lsa front elevation of the machine portlon' shown in plan in Fig. 1;

Fig. 3 is a section on the line 3-+ 3 of Flg. 2;

Flg. 4 ls a, section on the line l 4 of Flg. 1 laut illustrating acha'nged position of certain parts; Fig. 5 is a section similar to Fig.4 but showing a changecl position of some of the parts;

Flg. 6 is a section on the line li6 of Fig. 5; Fig. 7 is a plan ofanother portion of the machine;

Fig. 8 is a section on the line 8-8 of Fig. 7; Fig. 9 is a section onthe line 99 of Fig. 7; Fig. 10 is a section on the line llllll of Fig.7; Fig. 11 is a section cn the line lI-H of Fig. 10;

ing a chariged position cf certain of the parts;

Fig. 13 is a section similar tp Fig. 10 but showlr 1g a changedposition;

Fig. 14 1's a perspective illustrating a, lining shet inserting unit;

Fig, 15 is a, section on the line I5l5 of 13;

Fig. 16 is a, section on the line I6 I6 cf Fig. 15; and Fig. 17 is aperspective illustraa.tinga lined box as delivered by the machinedisclosed.

Referring now to the drawings, and more particularly to Fig. 17, th'eproduct of the machine will first be explained so as to facilitate further explanation of the mechanism anal funtion Q1 Fig.

Fig. 12 is a section similar to Fig. 11 but Show the various parts ofthe machine. As shown in- .F'ig. 17, the box to be lined by the machinedisclosed in this appll catlon is a. wenden box '20, having side walls20, 2ll end walls 20 2ll and a bottom all 20. The box parts a.resuitably secured togethe'r, for example, by nailing, and the top is leftoben. The box, when used. for packaging such material a.s cheese, isdesirably lined with metal feil 'and it is advantageous provide a liningwhich will be substantially impervious 1;0 air to thereby preserve thecontents of the box.

In this instance, the lining of the box conslsts of a, sheet 2Ipreferably of metal feil, th1s sheet being inserted in the box andpressed tightly against the bottom and the opposite 'side walls. 211 ofthe box. Marginal portions 2I of the lining sheet 2I are foldedoutwardly and downwardly over the top edges of the respectlve sldewalls.

The end walls of the box are each covered by an independent sheet oflining 1t1aterial designated 22, such sheet being provided with flangeportions 22% 22 which overlap the respectively adjacent marginal endportions o1 the sheet 2l. Top marginal portions 22 of the end liningsheets are also folded outwar dly and downwardly over the top edges ofthe respective end walls.

The mechanism about 1:0 be described ls arranged t0 press the respectivelining sheets snugly against the interior surfaceg of the box and topress the flange portions of the end lining sheets into intimateengagement with the respectively overlapped portions of the lining sheet21 so a.s 120 obtain a substantially impervious lining for the box.After the lining i inserted in the box so as to produce the arrangementillustrated in Fig. 17, the box may be filled with material such ascheese in a more or les5 liquid state, whereln it flows lnto all of thecorners of the lined box and by its own pressure, tends to inalntaln theoverlapped portiong of the.end lining sheets 22 and the lining sheet 2lin said intermediate engagemenjs. The cheese product subsequently Setsor becomes firm in the box and the flaps or marginal portions of thevarious lining sheet 4 e'lements are folded inwardly over the top 01 thecontent to complete the metal feil caslng 01 the product. A suitable boxcover, for example, awood. cover may then be atta ched to the open topof the box to close the same.

As indicated in Fig'. 1'7, the lining sheet element 2I which cove1s theopposite sldes and bottom oi the box, ls inserted in the box flrst. Themechanism for lnsertlng that portion 01 the lin-v ing is illustrated inFigs. 1 to 6 inclusive. By reference to said flgures, it will be seentha.t there is a main framework designa.ted 23 which supports a conveyorcha.in 24. Suitable guides in the form of angle iron members 25, 25 areprovided for guiding the conveyor chains 24 and the chain engages a.sprocket 26 which is journaled in suitable brackets supported by theframe, as clearly shown inFig. 2. The chains 24 also extend aroundanother setof sprockets carriecl by the portion of the machineillustrated in Figs. 7 to 16 inciusive and will be hereafter de--scribed. The chains 24, 24 are provided with cleats or lugs 21 which arearranged in spaced relation to receive boxes between thern and to feedthe boxes forwardly with the movement of the chains. As best shown inFig. 3, the boxes 20 are positioned on supports 28, 29 canied by theangle iron guide straps 25, such supports being in the form of twonarrow stra.ps between which the respective chains are disposed.

The chains 24, 24 are advanced step-by-step through the agency of aratchet 29 carried by the shaft on which the sprockets 26 are mountedand a pawl 30 which successively engages the ratchet teeth and is rockedabout the axis of the sprocket and ratchet shaft designated 3I. The pawl30 is pivoted to one end of a lever 32 which is pivoted intermediate itsends an the shaft 3l and which has pivoted to it;s other end, one end ofa connecting rod 33. The other end of the connecting rod 33 is pivoted130 a. crank 34 which is carried by a. shaft 35, the latter being drivenby means of a suitably driven chain 36 which engages a sprocket 31secured to said shaft 35.

Boxes 20 are positioned either manua.lly or otherwise an the boxsupports 28 and in engagement with transversely aligned cleats 21 on thefeed chains, so that the boxes are advanced step by-step and aresuccessively positioned in alignment with a vertically reciprocableplunger 38. For accurately aligning the boxes with the plunger 38, thereis provided a box-positioning device 39 which is equipped with brackets40, 40 designed to embrace the lower portions of the box adjacent itsopposite ends. The positioning device 39 is maintained in fixedhorizontal position but is vertically adjustably carried by a rod 4Iwhich is verticaliy slidably mounted adjacent its upper end in a bearing42 carried by guide mem bers 43 for the lower or returning reach of thechains 24. The lower end f the rod 4I is pro.- vided with a forkedbracket 44 which straddles the driven shaft 35 so as to prevent lateralmovement of the rod 4l while permitting vertical movemeni: thereof. Thebracket 44 is provided with'a roller 45 which engages a. cam 46 carriedby the shaft 35 and designed to efiect the desired vertical movement ofthe box-positioning device. Of course, the cam 46 is so timed that theboxpositioning device will operate in synchronized relation with theother parts of the mechanism. It is preferred that the positioningdevice 40 be moved to such an extent that it merely aligns the box withthe plunger but does not litt the box oft the supports 28, which shouldpreferably continue to Support the box throughout all of the subsequentoperations.

During the last step of movement in which a. bei: is advanced to thezone of operation of the plunger, a sheet of lini'ng material 2l is Iedto a. position overlying the boxes. As shown in Figs. 1 and 3, there isprovided a table-like member or shelf 41 which supports a stack S o1lining sheets 2l at one side of the pa.th of travel 01 the boxes. Forteeding the lining sheets 2l one-byone to a. position overlying the boxaligned with the plunger 38, there is provided the following pneumaticsheet-feeding mechanism:

Adiacent each side of the stacl: 01 lining sheets.

there is disposed a pneumatic pick-up device 48 o! small openings in itslower face which is adapted to be engaged with the top sheet of thelining sheet stack. The upper end 01 the taube 50 is connected by meansof a flexible tube 54-with a.

suitable vacuum pump. Valve means, which will presently be described,are provided for controllin g the suction of air through the pick-uphead 49. Adjacent the upper end ot' the pick-up tube 50 there is fixedlymounted a bracket 55 and a coil spring 56 is interposed between thelower end of the bracket 55 and the upper end 013 the bearing 51 tonormally and yieldingly hold the pick-up member in predeterminedelevated position, as illustrated in Fig. 4. The tube 50 is preierablysquared except at its upper end where the hose 54 is connected to it soas tc prevent otai;ion within the bearing 5I.

There, is associated with each of the pick-up members 49, a pneumaticpiek-up depressing member 51 which consists of a. cylinder 58 throughwhich a rod 59 is slidable. The rod 59 carries a plunger 60 and thecylinder 58 has a suitable connection a'djacent its lower end to thesuction pump previously referred to. Suitable valves, presently to bedescribed, are also provided for controlling the application of suctionto the cylinder 58. As shown, a flexible hose 6l serves 120 connect thecylinder with the suction pump. The cylir'xder 58 is suita.bly securedto a bracket 62 which is carried by a. fixed or stationary part of themachine so that the cylinder does not mov'e. The lower end of the rod 59which extends through the cylinder is provided with a presser foot 63having a. portion 64 projecting over a rearwardly disposed portion ofthe bracket 55 of the pick-up mechanisrn and said presser foot also hasa portion 66 slidably engaging a guide rod 61 to prevent rotary movementof the presser foot. It will be seen that when suction is applled to thecylinder 58, the presser :Eoot 69 will be lowered and through engagementwith the bracket will depress the vacuum pick-up device 49 intoengagement with the top lining sheet of the stack S. The valve mean salready alluded to cuts off the vacuum in the cylinder 58 at the propertime and opens the cylinder 56 to the atmosphere to relieve the vacuumand thereby permit -a spring 68 to restore the presser foot to it snormal position while the spring 56 serves to elevate the sheei. pick-updevice.

The pick-up device with a sheet; held thereto by vacuum is next movedtransversely to carry a. lining sheet over the top of a. box. For thispurpose, the slidably mounted members 53 are euch provided with anupwardly facing -ra.ck69

which mesh 'with gears or segments 10 which I ls gulded by means ofrollers 16 which are carried by a. suitably formed bracket 'I'I which iscarried by the straft II. The lower end of the rack 15 is pivotallyconnected to one end 015 a link 'Il, the lower end of which is pivotedby means of a. suitable connection to one end of a rock lever I8, theother end of which is plvotally mounted on a braoket 19 which is fixedlymounted on the framework of the machine. Intermediate 1ts ends, the rocklever 18 is provided with a roller 80 which engages a suitable cam trackprovided in a cam disk 8I which is carried by a straft 82. The shaft 82is rotatably mouhted in suitable bearings such as indlcated at 83 whichare carried by the framework of the machine and this shaft is driven bymeans of a chain 84 which engages sprockets 85 and 86 on the drivenshaft 35 and the shaft 82 respectively. The cam track in the disk 8I isshaped so as t;o provide the desired rocking movement of the rock leverI8 1:0 effect the desired horizontal reciprocation of the slide members53 which carry the pick-up members. Of course the cam which controls theoperation of the pick-up movement is timed to effect such movement inproper synchronism with the other operations of the machine. The liningsheet thus carried over the box is dispbsed on Shell members 8'I, 81which 'are disposed on opposite sides of the plunger and slightly abovethe plane of the top of the box. The valve means for controlling thesuction in the pick-up members is suitably actuated to relieve thevacuum to drop the linlng sheet on the saicl shelves.

The next step in the operation of the r'necha-' nism is that ofinsertirig the lining sheet in the box. The plunger designated 38 servesthis purpose and it comprises complementary side portions 89 and 98 andan intermediate or bottom part 9I, all of which are connected adjacenttheir respective ends to a pair 01 carrier members 92, 92. The plungerside parts 89 and 98 are connected to the carrier membrs 92 by means ofpairs. of parallel links designated 93, 93 which extend downwardlyandoutwardly from the carrier to their respective connectlons with the sideparts. The members 89 and 99 are further connected 150 the bottommember-9l by means of plus 94 which are securely mounted in therespective side parts and project inwardly and fit slldably inopenings95 drilled in the bottom member. Such slidable pin connectionsare locate adjacent the opposite ends.of the plunger structure, asindicated in Fig. 6, and they may also be located at suitable points inthe length of the plunger. The described slidable pin counectlon servesto cause the plunger parts 89, 90 and 9I to be movable vertlcally Inunison, while als the same time permitting the side parts to be adjustedoutwardly relative 120 the bottom part to thereby expand the normalwidth of the plunger. Springs such as 96 interposed between therespective carriers 92 and the bottom member 4 9I serve to normallymalntain the bottoin memdownwardly facing head platze 99 which is formedintegrally with the free end of an arm IIIII, the other end of which lssuitably secured to a, vertically reciprocable member IOI. is verticallyslidably mounted in a guide-way Ill2 which is rigidly secured to theframework of the mechanism, as best-shown in Fig. 3. The member IOI isconnected to one end 015 a-link I03 the other end 015 which is connectedto the free end of a rock arm IM, the other end of which iS pivoted. onthe bracket I9. The arm IM is provided with a. roller IIl5 which engagesa cam track in a disk Ill6, which is earried by the shaft 82. The camtrack in the. disk I06 is so shaped and timed as 170 efiect rocking ofthe lever IM and thereby reciprocation of the plunger carrler arm IM.

When the plunger is moved downwardly from the position illustrated inFig. 4, it flrst engages the lining sheet which at that time rests onthe shelves 8'I, 81, and possibly on the top of the box 28, and then inits continued movement into the box, inserts the lining shee-t in thebox in a loosely fitting condition. The extent. of movement of theplunger is somewhat greater than that required to bring the plungerbottom member 9 I into engagement with the bottom of the box, and theexcess movement serves to cause the plunger members 89 and 90 to spreadOutwardly to press the lining sheet agalnst the box sides, as clearlyshown in Fig. 5. Sch expansion of the plunger is incident to theengagement of the plunger bottom member 9I with the box bottom and thecontinued or excess movement of the plunger carriers 92 which, through.the parallel link connections with the side members,

The member III I causes the latter to move outwardly while retainingtheir transversely aligned relationship with the bottom member. II: willbe seen that the expansible plunger structure serves to effectivelypress the lining sheet to the box bottom and side Walls.

A further step in the insertion of tl1e lining sheet 2I in the boxconsists.in folding projecting marginal portions of the lining sheetoutwardly and downwardly over the top edges of the respective box sides.'Ihis folding is accompllshed by meanof folders I0'I, I0'I respectivelyassociated with the opjaosite sides of the box. These folders arecarried by shafts II)8 which are pivotally mounted in bearings I 89formed in brackets III! which are suitably secured to the plungersupporting rods 98. The folders IIII are normally urged to swingdownwardly by means of a spring I II which is stretcheid between thefree ends of arms II2, II2 which are secured to the respectlve rods I08and project upwardly therefrom. The folders are normally maintained ininitial or horizontal positlon, as illustrated in Flg. 4, by. means of arelatively stationary'cam track element II3 which acts on a roller IIIcarried by the free end 01 an arm I I5 which ls secured to one of theshafts III8. The cam track II3 is suitably mounted on a. couvenientlyaccessible portlon of the framework and lt ls shaped as indioated inFigs. 4 anal 5 so that the lowermost portion of the cam track ls offsetinwardly with re spect to the Uppermost portion, whereb the arm I I5 ispermitted to turn inwardly under the influence of the spring II I, withresultlng pivotal or folding movement of the folders. Associated withthe cam -tracl: II3, there is an auxilia.ry cam track element IIG whichis in the form of a spring metal member mounted adjacent its lower endon a. bracket element II'I a'.nd arranged with its upper free end incontact with the uppermost portlon I I3 01 the cum track II3. OndownWar'd movement o! the plunger and the folder, the roller I I4 ridesdownwardly on the portion II3 of the cam track und then over theauxiliary portion II until such time that the roller may drop 011 theportion II8 and swing into engagement w1'th the otfset portion l III 015the cam track II3. By this mangement, the folding action is delayeduntll the lining inserting operation is practically completed.

Upon upward movement o! the plu'nger, the roller IM of the foldingmechanism rides upwardly on the cam track portion II3" and the lncllnedcam track portion II3 until it aga.in 13 disposed in engagement with theupper portion II3. In this movement, the roller III swings the portionII 6 away from ehe cam track portion II3 but as soon as the roller Illclears I:he free end of the spring trac k portion IIG the latter returnsto its operativposition a.s illus trated. Simultaneous movement inopposlte directions cf the folders III'I i efiected by means oftheinter-connecting link III8 which is counected a1: its ends to arms III8which extend upwardly and downwardly respectively Irom the shafts III8.

When the lining sheet; 2I has been inserted in the manner abovedescribed, the box posltioner is next retracted so as to free th 'e boxand the box feeding conveyor is again advanced another step t'o bringanother box into operative position with reference to the lininginsertlng plunger.

Associated with the mechanism thus Iar described is the mechanismillustrated in Flgs. 7 t0 16 inclusive which serves the purpose o1.inserting the end lining sheets 22'. Both of the end walls are linedsimultaneously. The boxes partially lined by the above describedniechanism are fed step-by-step into operative relation to a pa.lr ofplunger devices II8, H8 which are respectively disposed adjacent theopposite ends o1 the box.

For actual positioning the box in alignment with the plungers II 8, II8in this pa.rt 01 the mechanism, there are provided two pa.irs 01 fingerdevices operatively associated with the respective ends of the box.These finger devlces include pairs of arms II9, II!) which are carriedby sha.fts such as I2II, suitably journaled in upstancling frame parts23. One of the arms II9 of each pair is provided with an extension I2I'which has pivoted to it one end 015 a link I22, the opposite end ofwhich is pivoted to the Iree end of a. rck 1ever I23. The rock lever I23is pivoted at its other end, as indicated at III, on a Irame partprovided for that purpose und it is provided lntermediate its ends witha. cam roller I25 which engage'as a cam I2Ii shaped to efiect thedesired rocking movement cf the lever I 23 and incidentally swinging ofthe arm pa.irs I I9. As hast shown in Flg. 8, the arms III! are provldedwith inwardly extending finger portions I2'I which a.re flared outwardlysg that upon inward movement of the flngers they will embrace the boxeven though it be out cf its proper position and adjust.

the box to the desired position of alignment wlth the plunger mechanism.The cam I26 which operates the finger paii is carried by a. shafi; I28

which is journaled in bearings provlded in couvenlently located frameparts.

It will of course be understood that the above descrlptlon 01 the boxpositioning flnger mecha- .nism applies to the mechanism associated witheach end of the box. The mechanism 13 substana main drive shaft I33which may be driven from any suitable source 013 power by such means asa. drive chain I3! which engages a sprocket I35 an the shaft I33 and asprocket carried by a motor shaft o1 the 1ike. The chain 36 whichtransmlts power to the shaft 35 o1 the previously described mechanism,is itself driven by engagement wlth a sprocket I3Ii which ls carried bythe main drive.

shaft I33, as shown in Fig. 8.

During the time tha.t the box is being positloned by means of thepositioning fingers or immediately betete or after such time, a linlngsheet for each end of the box is prepared. As shown. in Fig. 9, rolls ofmetal toll or like lining material are indicated a.t I3'I, I3'I. suchrolls being rota.tably mounted on suitable arms projecting from theopposite sldes 01 the framework of the machine. The strip of liningmaterial Irom each supply roll is threaded between feed roll pairsembodying a presser .ro1l I38 and a driven roll I39. The driven roll I39is adyanced step-by-step through the agency 015 a pivoted leverI4Itwhich 1s provided with a. paw1 HI at one end fdr engagement with theteeth of a ratchet wheel M2 which is mountsd on a s haft N3. The otherend of the lever IN 1s connected to one end of a push rod I, the otherend o1 which is pivoted to one end of a Divoted lever I45. The other end01 the pivoted lever I is provided with an antitriction roller forengaging a cam IlIi which is carried by the driven shatt I28 und servesto rock the lever M5. II; will be seen that the caxn MS 1s operativethroug the connections described to efiect rocking of t paw1 carxying1ever III! and hen ce rotation in e direction of the shaft M3. Theshafl; M3 also carries a gear I 41 which meshes with a pinion gear M8connected to the feed roll I39 to thereby efiect rotation in oned1rection only cf the feed roll I39. The extent 01 Ieed movementimparted to the roll I39 may be adadjusted through theagency of anadjusta.ble connection between the rock lever I40 and the push rod I.

The lining material which is fed Iorwardly by the means just; describedis guided over a guiding element l49 and between guide strips I5II,.I5II to a position on a. support. I5I. When the proper length 012material is disposed on the support I5I it is severed from the supp1ystrip by means 015 shears which includes the blades I52 and I 53, thela.tter being pivoted together as indicated a1; I54. The blade I52 isprovided with an extension I52 which carries a roller d1sposed in a camgroove provlded in a. rotatable disk I55. The shear bla.de I53 simllarly1s provided with an extension or I arm I!i3 which is also provided wltha. roller .en-

ga.ged in a camgroove carried by the said cam wheel I55. The ca'm wheelI55 1s oscillated so as to operate the shears by means 01 a. 1ink I56hav- Ing a suitable pivoted connection at its upper end to the camwheel. The lower end 01 the llnk I56 is suitably pivoted to the free endcf the arm I5'I of a hell crank having another arm I58 provided wlth anantitriction roller for engaglng a cam I59 which is carried by thedr1ven shafl; I28. The ca.m I59 is so shaped as to efiect the desiredrocking of the hell crank arms I5I, I58 and hence the requirecloscillation of the cam wheel 155 for operating the shears.

By reference to Fig. 10 i1; Will be seen that the lining sheet elements22 thus iormed are positioned on the support 151 with an end portiondisposed beneath a plunger element 160 whih is carried by a. carrier orholder element 161, the la.tter being in turn carried. by means of abracket 162 which is secured 130 a. vertically slidably mounted member163.

The member 163 is suitably mounted in a suitable guide 164 which isformed integrally with o1 suitably attached 1:0 the frame of the machineand the slide member 163 is provided with a rack 165 which meshes witha. gear segment 166. The gear segment 166 is mounted on a, sha.it 161suitably carried by the frame of the machine. The arm 168 is alsocarried by the shaft 161 and has connected to it one end of a.connecting rod 169. The other end of the connecting rod 169 is connected130 one end of a rock lever 110 which is pivoted adjacent its other end,as indicated at 111, on a. suitable support. Intermediate its ends, therock lever 110 is provided with a. roller 112 which engages a. camgroovia in a cam wheel 113 which is carried by one ot' the shafts 128.

The cam 113 is so shaped that it first imparts a. short downwardmovement 1:0 the plunger 160. The first downward movement of the plunger160 brings its bottom surface into engagement with that portion of thelining sheet 22 disposed under the plunger, as indica.ted in Fig'. 10.In order to hold the lining sheet 1:0 the plunger 160, the latter 1sma.de hollow as shown in Fig. 10 and connected by means 015 a flexibletube 114 to a. vaizuum pump (not shown) The exhaustion of a1r from theplunger by means of the vacuum pump is of course controlled by asuitable cam actuated valve, the loca.tion 015 which is indicatedgenerally a1; 115 (Fig: 8), the valve being actuatd by means of a camcarried by the shaf1: 132. Other a.ir controlling valves are alsoillustrated in Fig. 8 and it will beunderstood that as many valves asrequired for the purpose 01 this mechanism ma.y be located in the groupillustrated and operated bysuitable cams carried by the shaft 132. Thebottom cf the plunger head 160 is apertured as indicated at 116 topermit vacuum gripping of the engaged portion of the lining sheet 22.

The next step in the operation of the mechanlsm is that of forming theflanges such as 22* an the bottom a.nd side edges 01 the lining sheet 22preparatory 1;o i ts insertion in the box. In order to facilitate theformation of such fianges, the plunger 160 has connected to it a. pa.irof side members 111, 111, these member s being connected Ior verticalmovement in unison with the bottom pa.rt 160 through the agency of a.pin-and-hole plunger earrier 161, so that the slde members are capzibleof limited upward and outward expanding movement relative 130 thecarrier but only autward expanding movement relative to the plunger 160.The side members 111 are of a vertica;l dimension whicl1is somewhatgreater tha.n the dpth of the box 120 be lined.

The lining sheet element 22 on the support 151 is next folded upwa.rdlyaround the lower freut corner cf the plunger, this being accomplished byswinging the support 151 upwardly. The support 151 ha.s associated withit a. pa.ir of side members 180, 180 which are 'rigidly connectedtogether by means of cross straps 181, 181. The side members 180 areiurther pivotally mounted on a. pintle 182 which is carried in suitableupstanding parts of the framework. The Support 151 has a. sort offloating connection with the members 180, in that the frame is providedwith a. plurality 01 U- shaped strap elements 183 having their legsanchored 110 the b ottom of the support 151 end straddling the crossbars 181. An adjusting screw 184 is provlded for supportin the sidemembers 180 in predetermined. position relative 1:0 the support 151 andthe latter-1s supported byengagement of its brackets 163 with the framepart 23, as shown in Fig. 10.

For actuating the support 151, a. link 185 has one end pivoted to atrack projecting from one 01 the cross members 181 end its other endp1voted as indicated a.t 186 to an arm 181 which is' carried by a shaft188 piv oted in parts 01 the framework 23. A'pini0n gear 189 alsomounted on the sha.ft 188 meshes with a. gear segment 190 which ismounted for rocking movement on the shaft 120 between positioningcollars 191, 191 (see Fig. 8). The segment 190 is rocked through theagerxcy of a connecting rod 192 pivoted a1; one end, as shown in Figs. 9and 10, to the gear segment a.nd at its other end to one end of a rocklever 193 which is suitably pivotally mounted, a.s indica.ted in Fig. 9,end provided with an antifriction roller for engagement w1th a. cam 196Ca.rried.by the shaft 128. As shown in Fig. 9, the rock lever 193 at theleft-hand slde of the figure is ivoted at. one of its ends und. provldedwith a ca. -engaging roller intermediate its ends, while the k lever 193at the rlght-hand s1de of the figure is pivoted intermediate its endsand has a cam engaging roller ca.rried by i1;s free end.

When the gear segment 190 is actuated by the described meansjt will beseen that the arm 181 is swung upwardly and through the agency o1 thelink 185moves the connected side members 180 upwardly-- about the pintle182 ntil the cross members 181 engage the bottom 01 the support 151. Assoon as the support is thus engaged, it will also be swung upwardlyabout the pintle 182.

During the upwa.rd swinging movement 015 the support 151 end sidemembers 180, the lower or forward end portion o f the lining sheet 22 isof course held to the lowered plunger by the vacuum means described sothat the liner is ca.rried upwardly .into engagement with the faces ofthe plunger slde members 111. By reference to Fig. 12,11, will be seenthat when the members 151 and 180 assume their folded position withreference 1:0 the plun'ger the side members 180 fold side portions ofthe lining sheet over the edges of the members 111 to foim the fia1lges22. Also, 11: will be evident that in the folding movement, a. bottomfiange 22 is also formed (see 13).

When the lin.ing sheet has thus been provlded with slde and bottomflanges 22, it is in condi- 'tion Ion being inserted in the .box. Thisis accomplished by lowerlng the plunger into the box, by means cf a.further step in the cam 113 acting through the segment 166. When lowered120 lnsert the llning sheet in the box, the plunger mechanism assumes.the relationshlp shown in Flg. 13. 'Ihe vacuum is ma1ntained in theplunger 160 to holdthe sheet to the plunger durlng the lowering thereofand when the plunger arrives at 1ts lowermost posltion, the vacuum 1scut oft. 'Ihe cam I'I3 is shaped to impart slightly greater downwardmovement than is requlred to bring the head I60 into engagement w1th thebottom 013 the box. During such excess movement, the plunger s1demembers I'll are forced outwardly towards both the end and, side wallso1 the box by reason of the parallel link connections of the sldemembers with the carrier, as above explalned. In other words, theplunser side members I'll are-moved outwardly toward the respectivecorners 01 the box to press the llnlng sheet 22 and 1ts flanges 22agalhst the end wall und side walls respectively. As shown In Flgs. 15and 17, the flanges 22 over1ap the ad;lacent end portions of the llningsheet 2I.

For folding the upper marginal portions 02 the lining sheet outwardlyand downwardly over the i;op edges of the end walls of the box, thereare provided on each 01 the phingers folders in the form of U-shapedwire members designated I95 having their opposite legs slldably mounteclin suitable apertures in the upper ends of the plung- .er members I'll.'Ihe apertures through which the folder legs slide are of coursesuitably elongated to per-mit the spreading er expanding movement of theplunger parfs. 'Ihe plunger parts are further provlded with atransversely extending-groove 196 adapbed to normally house the folder.'Ihe tolder ls further guided by means of a rod I 91 which is slidablymounted in allgned apertures l98, 198 provlded in an arm l99 Iormedintegral w1th one of the plunger parts I'll (see Flg. 14). A spring 200disposed around a part of the rod I9! serves to normally-urge the folder4 into-the recess I96.

When the plunger is in its lowered p0sition as shown in Flg. 13, theupper end of the tolder rod 101 1s in alignment with a pneumatlcallyoperated presser 20I. The pneumatic folder operating mechanism ls bestshown in Figs. "l, 8 and 9. 'By reference to the sald flgures, lt willbe sen tl1 at the operating mechanism lncludes for euch holder a.cylinder 202 within whichjs a piston 203 carried by a piston rod 204. Aspring 205 normally urges the nisten rod to move outwardly and lnwardmovement of the plston and plston rod is eflected by exhaustion of a1rfrom the piston through the agency 01' a connection 205 wlth an exhaustpump. Of course the connection 205 is controlled by a valve 'arrangementsuch as previously referred to. At 1ts upper or free end, the piston 205carries the presser member 20l which extends latera.lly so as to overlie the outer end o! the folder rod 191 when the latter 1s in loweredpositio'n. For preventing turnlng 015 the presser 20I, its other end isextended laterally and Iorked, as best shown in Flg. 7, to engage astationary gulde rod 206 along which the forked end ls' slldable. Asshown in the dranivlngs, the cyllnders 202 Sud pistons 204 a.reangularly arranged so as to be parallel wlth the angle ofthe variousoperating parts in the obvlous manner and the conveyor chains whichcarry the box a1e again advanced to dlscharge the lined box und advanceanother box into the operating zone 01 the mechanlsm. y

It will be understood that the mechanism 1'or applying the lin1ng sheet2l and the mechanlsm for applying the lining sheets 22 maysimultaneously be operating, 01 course on separate boxes. In themechanism described, the end linlng sheets are inserted after the sidelining sheet so that the former dverlap the latter. However, it will beseen that this arrangement may be reversed it desired and the sidelining sheet 2I inserted after the end linlng sheets, so a.s to causethe side llning sheet to overlap the fiange gertions 22 015 the endlining sheets.

The descrlbed structure presses the linlng sheets tightly to the walls015 the box and presses the overlapplng lining sheets together tightlyso as to facilitate the production of a. substantially impervious liningin the box. 'I'his leature ls of considerable value, in that boxes solined veryv effectively preserv'e food products which may be packaged'in boxes cf the type described. The mechanisxn is wholly automatic andrequires but little attention from an operator.

Changes in the described constructlon may be made without departing fromthe spirit of the invention, the scope of which should be determined byreference to the following claims, the same being construed as broadlyas possible consistent with the state of the art.

I claim:

1. In a machine qf the cl ass described, mean s for supporting andadvancing boxes step-by-step, a plunger adapted to successively entertheboxes, means Ior efiecting accurate allgnment of the successlve boxeswith the plunger, means for feeding a lining shiaet into positlonoverlying the box, means Ior'efiecting movement 015 the plunger into thebox 'to lnsert said lining sheet in the box, said plunger beingtransversely expanslble for pressing the lining sheets to the box sides,means fc etfectlng expanslon 01 said plunger, spring-actuated foldingmeans carrled by sai L:plunger mechanism and movable verticallytherewith for folding marginal portions of the lining sheet downwardlyover the top edges o! the box sides, and relatlvely statlonary cam meansfor controlling said foldlng means.

2. In a machlne of the dass described, the combination 012box-supporting means, a plunger adapted to enter the box to lnsert alining sheet therein, sald. plunger belng laterally expansible alter itsinsertlon in the box to pres s the llnlng sheet; to the box walls, andfolding means movable downwardly from the upper edge o! the box on theoutslde thereof for folding marginal portions o1 the llning sheetdownwardly over the top edges cf the box sides.

3. In a machine of the class descrlbed, the combinatlon 015box-supporting means, a. plunger' adapted bo enter the box to insert alinlng sheet therein, said plunger couiprising a carrier, a nettemmember and a pair of side parts counected together for unltary vertlcalmoyement but so that said side parts are laterally outward- 1yadjustable relative to the bottom part, paral1el link means extendingdownwardly-and oul;- wardly from sald ca.rrler to each of the sideparts, arid resill'ent means between said bottom member and the carrier,whereby sa.ld side parts are laterally outwardly adjmtable as anlncldenl:v

to downward movement of the carrier relative to said bottom member.

4. In a machine of the dass described, means for supporting andadvancing boxes step-by-step, a plunger adapted to successik1ely enlterthe boxes, means for efiecting accurate alignment 01 the successiveboxes with the plunger, means for feedlng a lining sheet into positionoverlylng the box comprising vertically and horizontally adjustablymounted pneumatic sheet pick-u means, horizontally fixed means forefiectlng downward movement of said plck-up means for engaging thepick-up means with a linlng sheet, means for effecting horizontalmovement of said pick-up means 120 carry the engaged lining sheet tosaid position relative to the box, and means for efiectlng movement ofthe plunger into the box to insert said lining sheet in the box.

5. In a machlne of the dass described, the combination of mean's foradvancing a box stepby-step, means associated with one rast positlon ofa box in its step-by-step movement for inserting in the box a box bottomand s1de wall llning sheet, means associated with another rest positionof the box for forming bottom and side flanges on a box end wall lining'sheet and silbsequently inserting such sheet in the box wlth theflanges thereof in overlying relation bo an adjacent marginal portion ofthe bottom and side wall lining.

6. In a machlne of the dass described. th combinatio1'u ofbox-supportlng means, and a plunger adapted to enter the box to insert alining sheet therein, said plunger belng latrally expansible diag'onallyo1 the box towards a corner thereof to press the lining sheet into suchcorner and against both adjacent wall portions.

'7.In a machine of the dass described, the combination of box-supportingmeans, and a plunger adapted to enter the box to insert a lining sheettherein, said plunger be iug laterally expansible diagonally of the box,as an inddent to engag'ement thereof with the box bottom, towards acorner thereof so as topress the linlng sheet into such corner andagainst both adjacent wall portions.

8. In a machine of the dass described, the combination of box-supportingmeans, a plunger adapted to enter the box, means for positionlng the boxin alignment with the plunger, means for positioning a lining sheet inpredetermined relation to an end of the box, and means for effectingmovement of t;he plunger 1nto the box to insert said lining sheet in thebox, said plunger being transversely expansible diagonally of the box,after insertion of the lining sheet, towards both corners at said end cfthe box thereby to pre'ss the sheet to both the end wall and theadjacent portions of the side walls of the box.

9. In a machine of the dass described, the combination of box-supportingmeans, a plunger adapted to enter the box, means for positionlng the boxin alignment with the plunger, means for positioning a lining sheet inpredetermined relatlon to an end of the box and means for effectingmovement of the plunger into the box to insert said lining sheet in thebox, said plunger comprising a carrier and slde parts, the latter beingadjustable relative to the carrier and diagonally o1 adapted to enterthe box, means for positioning the box in alignment with the plunger,means tor positioning a lining sheet in predetermined relatlon to an endof the box, means for effectlng mvement of the plunger into the box tolnsert said lining sheet; in the box, said plunger comprising a carrierand s1'de part;s relatively adjustable from normal relation 120 expandedrelation for pressing the liningsheets 130 both the end wall and theadjacent portions 01 the box sides, means for efiecting expansion ofsaid plunger, and means for folding a marginal portion of the liningsheet downwardly over the top edge of the box end wall. 11. Ina machineof the dass described, the combiriatlon of box-supporting means, aplunger adapted to enter the box to insert a llnlng sheet therein, saidplunger being laterally expanslble. towards both the end and side wallsof-the box to press the lining sheet thereto, and means for folding amarginal portion of the lining shee't downwardly over thetop edge of theend wall. 12. In a. malchine o1 the dass described, the combination ofbox-supporting means a plunger adapted to enter the box to insert a.lining sheet therein, said pluhger being laterally expanslble towardsboth the end and side walls of the box to press the'linlng sheetthereto, means carried by said plunger and vertically movable theremthfor folding a marginal portion 013 the lining sheet over the top edge ofthe end wall, and relatlvely stationary folder actuating meansoperatively associated with said folding means when the plunger is inlowerecl position.

13. In a machine of the dass descrlbed, the comblnation 01box-supporting means, a plunger adapted to enter the box to insert alining sheet therein, said plunger comprising a carrier, a bottom membervertically adjustably mounte'ad on said carrier and provided with meansfor holding the linlng sheet to the plunger, a palr 01 side partsconnected to said bottom part for unitary vertical. movement therewithbut so that said side parts are laterally adjustable towards theadjacent corners of the box, parallel link means connecting each of saidside parts with the carrler, and resilient means normally malntalningsaid bottom member and side parts in downwardly adjusted relatlon to thecarrier, whereby said side pants are laterally outwardly adjustableas'an Incident to downward inovement of the carrler relative to saidbottom member.

14. In a machine o1 the dass descrlbed, the combination ofbox-supporting means, means for applying a lining sheet to the end walland adjacent portions of the slde walls of the box an said supportingmeans, said lining sheet a'pplylng means comprlsing a plunger having awldth less than the interior width of the box, means for applying alining sheet to the face 01' said plunger and folding marginal portionsof such sheet over the opposite sides of the plunger, and means Iormoving said plunger into the box adjacent an end wall to be lined, saidplunger being expanslble after its in'sertlon in the box so as to pressthe 1lning sheet and its folded marginal portions to the end wall andthe adjacent side wall portlons, substantially as described.

15. In a mach.ine of the dass described, the combinatlon of boxsupporting means, and a plunger adaptedto enter the box to lnsert a lin-1ng sheet therein, said plunger comprlslng a carrler and bottom and sideportions independently adjustably connected to said carrier, the bottomportion being adapted to clamp the l1ning sheet 10 extepding 1zzterallyfrom the normal plane o1 the sheet, mean s Ior eflectlng movement otsald plunger into a. box disposed on sa1d supportlng means and into suchposltion as to apply sald sheet to an inside Wall portion 01 the box.wlth the flanges cf the sheet overlapplng adja.cent wall portioris,means for efiectlng release 01 the sheet Irom the plunger, a.nd meanstor etfectlng withdrawa.l of the plunger from the box so a.s 1:0 leavesaid sheet applied. to sald wall portlons.

JACOB SCHNUR.

